Guest Star - Kaley Cuoco
Kaley Cuoco has guest starred in 1 episode of Stuart Fails to Save the Universe.
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102. Spoiler: Zack's in This One as Penny
Aired July 30, 2026
Stuart, Bert, Denise, and Barry Kripke find themselves in an idyllic, peaceful Earth...that happens to be controlled by a repressive and vicious AI.
Other Shows
Kaley Cuoco is credited as a cast member in 279 episodes of The Big Bang Theory.
Main Cast: Seasons 1 - 12
Character: Penny